/// <summary>
/// Removes top x subcategories, where x is defined by input parameter.
/// </summary>
/// <param name="howMany">Indicates how many subcategories you want to remove.</param>
public void RemoveLastSubcategories(int howMany)
{
int count = SubCategories.Count;
for (int i = count - 1; i > count - howMany - 1; --i)
{
SubCategories.RemoveAt(i);
}
Parent.IsResultChanged = true;
}